-
Hi Guest!
If you appreciate British Car Forum and our 25 years of supporting British car enthusiasts with technical and anicdotal information, collected from our thousands of great members, please support us with a low-cost subscription. You can become a supporting member for less than the dues of most car clubs.
There are some perks with a member upgrade!**Upgrade Now**
(PS: Subscribers don't see this gawd-aweful banner
Hey - did you know if you click on the title of a thread it will take you to the first unread post since you last visited that thread?
but were afraid to ask: 
STOP!! Never post your email address in open forums. Bots can "harvest" your email! If you must share your email use a Private Message or use the 
smilie in place of the real @
Pretty Please - add it to our Events forum(s) and add to the calendar! >> 
Spitfire spitfire mk3 '70 brake pressure switch pdwa
- Thread starter cutlass29
- Start date
Share this page
Offline
Paraphrased from the factory workshop manual:
* Fit a rubber tube...to a brake bleed-screw at the opposite end of the car to that which has just been bled.
* Open the bleed-screw.
* Switch the igntion on but DO NOT START THE ENGINE. (The brake warning light will glow but the oil warning light will remain extinguished.)
* Exert a steady pressure on the brake pedal until the brake light dims and the oil light glows (A click should be felt on the pedal as the shuttle [in the PDWA] returns to its mid-position].
* Tighten the bleed-screw.
NOTE: If the pedal has been pushed too hard [or the wrong side of the system was bled] the shuttle will move to the other side of the valve, thus requiring the procedure to be repeated on a brake at the opposite end of the car.
Some folks clamin success by undoing the sender for the light from the PDWA, and then manipulating the shuttle with a screwdriver. I prefer this method. It takes a bit of practice to "feel" what happens, but you'll know it when you feel it.
* Fit a rubber tube...to a brake bleed-screw at the opposite end of the car to that which has just been bled.
* Open the bleed-screw.
* Switch the igntion on but DO NOT START THE ENGINE. (The brake warning light will glow but the oil warning light will remain extinguished.)
* Exert a steady pressure on the brake pedal until the brake light dims and the oil light glows (A click should be felt on the pedal as the shuttle [in the PDWA] returns to its mid-position].
* Tighten the bleed-screw.
NOTE: If the pedal has been pushed too hard [or the wrong side of the system was bled] the shuttle will move to the other side of the valve, thus requiring the procedure to be repeated on a brake at the opposite end of the car.
Some folks clamin success by undoing the sender for the light from the PDWA, and then manipulating the shuttle with a screwdriver. I prefer this method. It takes a bit of practice to "feel" what happens, but you'll know it when you feel it.